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[STDS-802-11-TGAX] Calculating TXOP Duration For HE Trigger Based PPDU's HE-SIG-A2

Hello all,

There is no specific rule in D1.1 about how to populate the TXOP Duration value for Trigger based PPDU's HE-SIG-A2. 

Given the different granularities (8us, or 128us), and multiple places to get NAV values (Trigger frame's HE-SIG-A2, or Trigger frame's Duration field), it can lead to the situation that different STAs may put different values into its own HE-SIG-A2 TXOP Duration fields in their own Trigger based PPDU.

My opinion, we should let the AP to put the value in Trigger frame's Common field (extra 7 bits needed) for all the STAs just simply copy the value into their own Trigger based PPDU's HE-SIG-A2.

Does anyone object to this proposal?

thx,

huizhao
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